Brake device



BRAKE DEVICE Filed July20, 1925 2 Sheets-Sheet l 1,665,753 o. PETERSON BRAKE DEVICE Filed Ju1y20. 1925 April 10, 1928.

2 Sheets-Sheet 2 Patented Apr. l0, 1928.

UNITED STATES PATENT OFFICE.

OSCAR PETERS-ON, OF CHICAGO, ILLINOIS, ASSIGNOR TO MILLS NOVELTY COMPANY, F CHICAGO, ILLINOIS. vA CORPORATION OF ILLINOIS.

BRAKE DEVICE.

Application llled July 20, 1925. Serial No. 44,767.

This invention relates particularl to a brake-device applied to music sheetceding mechanism.

The primary object is to provide an automatically actuated brake for sheet-feeding mechanism, such as sheet-feeding mechanism employed for feeding a music sheet in elec-v trically operated musical instruments. More especially, it is the object of the Present invention to provide mechanism o the character indicated With a brake which is automatically applied to the take-up roll after the playing operation has been concluded and previous to the rewindinv operation and which is automatically withdrawn from the braking position previous to or at about the time the playing operation begins.

By means of the im roved device, a desirable tension can be p aced upon the music sheet during the rewinding operation, that is, While it is being rewound from the takeup roll onto the music roll, and, on the other hand, the brake is inactiveduring the playing operation, so -that the motor does not need to overcome the retarding effect of the brake during the playing operation.

The sheet-feeding and rewinding mechanism may be of any suitable construction. It is preferred to employ sheet-feeding and rewinding mechanism of the type described and claimed in Sandell Patent 1,302,439, granted April 29, 1919. In this ty of mechanism, a shaft driven from an e ectric motor and disposed in axial alignment with the take-up roll carries what 1s termed a compound dog, which, in the direct rotation of the motor drives the take-up roll through the medium of a crank with which its shaft is equipped, and, in the reverse rotation of o the motor, engages a lug on a gear of a geartrain which drives the music roll and thus effects rewinding of the music from the take-up roll onto the music roll. Such mechanism is also equipped with a tracker-bar, or contact-roll, over which the music sheet passes and with which co-acts a series of electric contacts which control the circuits which operate various elements employed in the playing of the musical instrument.

As is well known in the art, a music sheet may be employed to control the playing of a piano, an organ, a stringed instrument of the viol class, or a combination of such musical instruments; and sheet-feeding and re- Winding mechanism of the kind, lfor example, shown in Sandell Patent 1,302,439 may be employed for effecting the feeding of the music sheet during the playing operation and then effecting the rewinding of the music sheet upon the music roll. The sheetfeeding mechanism described in the patent mentioned is capable of repeating its cycle of operations as long as power is supplied. That is, such mechanism will draw the music sheet from the music (storage) roll and wind it on the take-up roll during the playing operation, will then automatically rewind the music sheet on the music roll, then repeat the playing operation, etc.

, The invention is illustrated in its preferred` embodiment in the accompanying drawings as applied to sheet-feeding and rcwinding mechanism of the kind disclosed in Sandell Patent 1,302,439, only so much of said mechanism being illustrated as is necessary for an understanding of the present invention. In the drawings'- Fig. l represents a broken front elevational view of sheet-feeding and rewinding mechanism equipped with they improved automatic brake; and Fig. 2 represents yan end elevational View, partly in section, of said mechanism.

In the illustration given, A designates the frame `of the sheet-feeding and rewinding mechanism; B, a music roll suitably journalled in the frame; C, a take-up roll; D, a metallic contact-roll, or tracker-bar; E, a music sheet which passes from the music roll in front of the contact-roll and thence to the `take-up roll; F, a motor which operates through a. worm-shaft F and a wormwheel F2 to actuate a shaft F3 ineither direction, depending upon the direction of rotation of the motor; F4, a compound dog of reversible character, which is Xedly secured on the shaft F3, being interposed between a crank G with which the shaft of the take-up roll is equipped and the lower gear of a gear-train H which serves to actuate the music roll B during the rewind operation, the compound dog F* being thus 1n position to actuate the take-up roll C through the medium of the crank G during the playing operation and to actuate the music roll B through the medium of the gear-train H during the rewind operation; I, a contactcarryinginsulation-bar mounted on a rockframe I which is supported on pivots I (one shown), the rock-frame I being equipped with an actuating arm ls, through the medium of which the roclnrame may be turned on its pivots to bring the electric contacts which co-act with the contact-roll D and music sheet E to the operative position; J, a pivotally suspended foot, or link, which is connected by means ot a pivot 1 with an arm 2 depending' from the arm la, the link J serving,` in the operation of lifting; the arm I3 to throw the contact-carryingbar I to the music-playimeposition; l, a latch link having` a rearwardly curved upper end which is connected by means oi a pivot-bolt 3 with the arm la, the link l 'being provided at its lower end with a notch Il which engages a stud 5 which projects from the end member of the trame A and thus supports the arm I3 in its elevated position, in which position the contact-carrying bar I is held in the music-playing position; L, a spring-held trip-lever which is journalled on the stud 5 and which is equipped with a lug` 6 adapted to engage the link K and release it from en* gagement with the Stud 5 when the rotation oit the motorie reversed, so that the arm la will be permitted to drop and the contactcarrying bar I will be thrown to the inoperative position before the rewinding operation begins; M, a spring which tends to throw the arm I3 downwardly and thus rock the frame I about the pivots l2, said springl being operative to perform this function in retracting the contact-carrying bar l; ll, a contact carried by the bar I and co-acting with the contact-roll D and thus serving to establish a circuit and effect reversal oi the motor at the end oi' the playing operation, this action being accomplished by a slot (not shown) in the music sheet which is beyond the kslots of the'sheet which serve in the playing operation; andi?, a switch-leverV equipped with a roller P which bears against the music sheet on the take-up roll C, the switch-lever P serving to eiect reversal of the motor at the end Vof the operation of rewindino the music sheet from the take-up roll onto the music-roll, so that the motor will resume its direct rotation for the purpose of feeding the sheet in the playing operation. Y Y

The mechanism thus far described is constructed and operates in substantial accordu ance with Sandell Patent 1,302,489, to which reference is made. j

The compound dog F4 which is secured ontheshaft F3 and which serves in the direct rotation oi `the shatt in the direction indicated bythe arrow in Fig. 2 to operate the take-up roll through the medium oi the crank G, and in the reverse direction or rotation to actuate the gear-train H and through the medium thereof, the music-roll to eii'ect rewinding oie the music sheet, corresponds with the compound dog 87 referred to in said patent. This compound dog isv Lasarte provided with a reversible member 7 which is equipped with an arm 7n which, when the shaft i rotates clockwise, as shown in Fig. 2, serves to engage and elevate the link J and thus lift the arm la., This result is accomplished preparatory to the playing operation, the contact-carryinl;` bar l being thus brought to the operative position. The re versible dog-member 7 corresponds with the member v ot' the patent mentioned. After the playingl operation has been completed, the position oif the donf-member 7 is reversed immediately after the motor starts to turn in the reverse direction, this reversal of the dog-member being eti'ected by the tripunember L, whose movement is resisted' bythe spring,l 8 acting upon a suitable arm with which the trip-member is provided. When this action occurs, the rm 7a finally moves the trip-member L iar enough to cause the lug (3 to engage the lower end portion of the latch link l, thereby releasing` Said link from engagement with the stud 5 and permitting the arm i3 to drop, thus carrying the contact-bar l to the inoperative position. The dog-member 7 is provided with an arm 7b w iich is equipped on one side with a lug,r 7C adapted to engage a lug, or wrist-pin, 9. whichi'orms a part of the crank G, and which is equipped on the other side with a lug` 7d adapted to engage lug 7'e with which the lower gear or" the gear-train H is equipped. 'Ehe operation in this respect is iully disclosed and described in the abovementioned patent.

he improved automatically applied and automatically released brakedevice is designated li. lt comprises a brake-shoe l0 which is adapted to bear against theadjacent flange ot the lower spool, that is, the` take-Upl roll C; a lever l1 which is suspended from a pivot 12 carried by vthe trame; .a spring 13 connecting,n the lleve-r with the traine and tending to throw the brake-shoe to the braking'position against the flange lli oi the spool C; and a link l5 whose lower end is pivotally connected at i5 with the short upper arm o1 the leve-r Yll and whose upper end is capable ot sliding through a perforationv in a lug` 16 with which the arm la is equipped. The upper end of the rod` like link 15 is threaded and equipped with nuts 17 above the lug' 16. Thus, when the arm i3 is lifted by the link J, the rod 15 will be lifted and will turn the leverv 11 about the pivot 1Q to the non-braking position shown in Fig. l. rlhis corresponds with the condition ot the machine when the contact-bar l is in the operative position, that is, in the music-playing position. The brake-shoe l0 is at this time released from braking-engagement with the take-up roll C, so the take-up roll can be Yfreely actuated by" the motor during the playing,l operation,

rlllie lower end portion ot the lever 1 is provided with an inturned arm 11Il extends through'a slot 18 with which the end frame of the machine is provided. The extremity of the arm 11iL is connected by a transverse pivot 11b with the brake-shoe 10. The lower end portion of the lever 11 also carries the short outwardly extending arm 11c which is provided with a perforation to which the upper end of the coil spring 13 circuits may be the same asthose shown and described in the above-mentioned patent, or may be of any desired kind and arrangement.

It may be noted that the arm I3 which actuates rthe rock-member I has a curved portion 19 extending through a perforation in the adjacent frame-member. The man'ner of mounting the rock-member and of actuating it is substantially as shown in the patent mentioned.

From the description given, the operation will be readily understood. Assuming the mechanism to be in the position shown in Fig. 2, the device is ready for the playing operation. In Fig. V2, the arm 7 of the member 7 of the compound dog F is about to pass from beneath the link J, which has been elevated during the initial portion of the rotation of the shaft Fs in a clockwise direction. As the direct rotation of the motor continues, the music sheet E is drawn from the music-roll B and wound upon the take-up roll C. It is to be observed that when the arm I3 was lifted by the link J, the rod 15 was raised, thereby swinging the lever 11 to the position shown in Fig. 1 and releasing the brake from engagement with the take-up roll. Thus, the take-up roll is free to be operated by the motor without retarding action by the brake. After substantially all of the music sheet has been transferred to the take-up roll, the contact N operates in a well known manner to close the circuit and effect reversal of the motor. This causes the shaft F3 to rotate in a counter-clockwise direction. When this occurs, the trip L reverses the dog-member 7, and the dog-member then operates through the trip to effect release of the lower end of the latch link K from the stud 5, thus permitting the arm I to drop under the action of the spring M. When this occurs, the contact-carrying bar I is thrown to the non-playing position. Also, the rod 15 drops with the arm which I, permitting the spring 13 to set the brakeshoe 10 against the flange 14 of the take-up spool. In the continued reverse rotation of the motor, the dog-member 7 of the compound dog F 4, secured on the shaft F3, serves to rotate the gear-train H in a well known manner and thus cause the musicroll B to rotate in the proper direction to rewind the music sheet upon the music-roll. At the end of the rewind operation, the lever P operates to e'lect reversal of the motor and cause it to rotate in its original direction of rotation, that is, in the musicplaying direction.

It may be noted that the free end of the lever P is equipped with a spring-held contact-member 21 which coacts with a contactplate 22 in a suitable circuit; also the lever P, which is pivotally supported at 23 is equipped with a contact-stud 24 which engages a contact-pawl 25 whose outer end is supported on a stationary pivot 26. The contact N is connected by a conductor 27 with the contact-plate 22. The lever P is further connected by a conductor 28 with a spring-projected contact-member' 29 which co--acts with a contact-member 30 carried by the rock-frame I. The rock-frame I is in electrical contact with the main frame, on which one side of the main circuit is grounded. lVlien the contact N makes contact with the contact-roll D at the end of the playing operation, and while the contact-carrying bar I is in the playing position, reversal of the motor occurs. However, this-interrupts the circuit at the point of contact between the member N and the roll D. The circuit is immediately re-established, however, by the contact-member 30, carried by the rockframe I engaging the contact-member 29. It should be borne in mind that this action occurs when substantially all of the music sheet is on the take-up roll C, at which time the right hand portion of the lever P, as shown in Fig. 2, occupies an elevated position, the pawl 25 being also lifted by the stud 24 and serving at a portion of the circuit as a conductor. The pawl 25 and the contactplate 22 are connected by suitable conductors 31 and 32 with the same binding post of the motor (the connection not being shown, however). Thus, at the end of the playing operation, current may pass from the brush N through the conductor 27 to the contactplate 22 and thence to the motor in a direction to reverse the motor; and after the brush N has been withdrawn from the contact-roll D, currentmay pass from the frame of the machine through the contactmember 30 to the contact-member 29, thence to the lever P, contact-stud 24, pivoted contact-member 25, and conductor 31 to the same binding-post of the motor. Eventually, the contact-member 21 is brought into fully established contact with the plate 22,

and the pavvl 25, supported by a stud 33, ceases to Contact With the contact-stud 9A oi the lever P. The circuit is new carried Wholly through the contact-member 2l to the contact-plate 22 and thence to the motor. Finally, the contact-member 2l Will springl pastthe contactplate 22, and the circuit will be broken. rlChis type of circuit-control ling device may be employed in connection with a motor having a Weak iield for direct operation of the motor and having a strong er iield which will dominate and overcome the Weak ield in the reverse operation of the motor, that is, when the revvinding is being eti'eeted. On the other hand, if desired, the electric circuits and controlling` devices may be the same as those shown in the abovementioned Sandell patent.

The present invention constitutes a modiiication of the invention described in my pending application No. 97,004, filed lidar-ch 24;, 1926.

The foregoing detailed description has been `given i'or clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed broadly as permissible, in view of the prior art.

What l regard as new, and desire to secure by Letters Patent, is:

l. ln means or" the character set forth, a reversible motor, a contact-carrying bar, a rock-traine on which said bar is mounted equipped with an actuating arm, means driven by said motor for lifting said actuincense normally tending` to apply said braking device and retracting means for said braking device actuated bv the actuating arm of said rocinframe.

2. in means of the character set forth, the

combination with sheet-feeding and revvind-V ing mechanism comprising a music-roll, a takeaip roll, and a reversible electric motor ter driving the rolls of a brake-shoe adapted to press against the end of the take-up roll, a lever carryin' said brake-shoe, a spring nornially tending to apply braking pressure through the medium of said lever, and niotoi'actuated means for retracting said lever.

3. in means of the character. set forth, the combination With a frame, sheetfeeding and rewinding. mechanism comprising a music-roll, a taire-up roll, and a reversible electric motor tor driving the rolls, of a lever supported on a pivot parallel with one end of the freine, said lever having an inwardly eirtendingA arm, a brake-slioe pivotally mounted on said arm and adapted to engage the taire-np roll, a spring tending,` to throw said brake-shoe to the braking. position, a latch restraining said lever from applying the brake during the playing operation, and

` motor actuated means adapted to retract said latch zitter reversalot the motor at the end ot the playing operatlon.

OSCAR PETERSON. 

